What do fund management, railway performance and FX trading have in common?  Nothing apart from the fact that they presented me with some challenges while building Power BI dashboards in 2019 - and were overcome with a few tweaks to a data model and a sprinkling of DAX.  I'll boil three case-studies down to their essentials, explain the challenge and describe my solution.  You may not be interested in comparing the performance of financial products, or if some trains ran on time, or the risk involved in FX trading but I hope the challenges and solutions I outline may strike some chord with the analysis problems that you have.

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